Multi-Possessed Hexcrafter

Multi-Possessed Hexcrafter power and toughness
are equal to 2 plus the number of creatures in all graveyards.
{b}, Discard a card: Target creature gets -4/-4
until end of turn.
"An ordinary self-inflicted possession would be already
a troublesome matter, however looks like this one
opened the door to much more."
- Gizel, Archmage of Toringram